They all have the same look. Their helmets are on their heads, chin-straps are on their chins, camouflage paint in place, their body armor is tucked down, their boot laces are tucked in, they are holding their rifles in down-barrel tactical position. Most of them aren't looking at the camera, except to shoo the suicidal photographer away.
None of them look like they are posing. None of them are standing out in the middle of the street. And I can't imagine any of them firing from the hip; if they were shooting, you can bet your last doughnut it was with a good cheek-to-stock position, snugged-in rifle, a good sight picture, probably from the prone position and in carefully controlled two- and three-round bursts.
This is the difference between a soldier and a soldier wannabe. The difference between half-trained barbarians and civilized human beings. The Israelis do not make a habit of going around murdering Palestinian children. They make a profession of killing armed Palestinian terrorists.
Note the head shot. Mahmud probably didn't even notice when he departed the gene pool. If you're ever in a firefight, don't stand out in the middle of the street with no cover, looking heroic. Someone will shoot you right through the brain, if any.